What does a "stacked" relay mean for installation

OEM-Grade Durability: Machined from heavy-duty materials to resist heat-induced deformation and corrosion in demanding furnace environments

Technicians rely on this furnace flame rollout switch to replace failing safety sensors that cause nuisance trips or total system lockouts

For technicians servicing legacy Utica-Dunkirk boilers

and BTS units within the 30

Reznor 195648 Fan Blade Els PW 17895 What does a "stacked" relayThe Reznor 195648 Fan Blade is a critical 16 inch HVAC replacement part engineered for high efficiency air movement in industrial unit heaters. Designed specifically for the UDAS 100 and UDP 100 gas fired models, this 3 blade fan propeller ensures optimal heat exchanger cooling and consistent discharge temperatures. A failing or unbalanced blade can lead to excessive vibration, motor bearing fatigue, and limit switch tripping due to reduced CFM.